Fungizone, also known by its generic name Amphotericin B, is a potent antifungal medication primarily used in the treatment of serious fungal infections. It belongs to a class of drugs known as polyene antibiotics and works by binding to the sterols in the fungal cell membrane, leading to the leakage of cell components and ultimately causing the death of the fungus. Fungizone is often reserved for use in severe cases due to its potential for causing side effects, including kidney damage and infusion-related reactions. It is administered intravenously and is used to treat a variety of life-threatening fungal infections, including aspergillosis, candidiasis, and cryptococcosis, especially in patients with weakened immune systems.